ZNetMeter is a graphical network traffic
monitor. It can monitor various types of ethernet connection, such as
Wireless (802.11b) LAN and USB (Zaurus cradle) LAN. It displays network
statistic in a line graph. You can also use ZNetMeter to record the
throughput in a specific period of time.

ZNetMeter is available for
download free of charge. ZNetMeter is currently in alpha stage.